Cold header



June 3, 1952 J. H. FRIEDMAN GQLD READER 12 Sheets-Sheet 1 Filed May 15,1946 \D INVENTOR.

J'OH/V HFR/fDMA/Y v BY g ATTORNE Y5 M w W m N \n.w mH A v J. H. FRIEDMANCOLD HEADER 6 .3 I w n wn I: v. *N \WM MN M H mw o mw i a m m 4 m \K M Q2 & am u June 3, 1952 Filed May 15, 1946 June 1952 J. H. FRIEDMAN2,599,053

COLD HEADER Filed May 15, 1946 12 Sheets-Sheet 3 4 INVENTOR,

JOHN HF/Q/EDMAN By wy;

A T NE m June 3, 1952 J. H. FRIEDMAN 2,599,053

com HEADER v Filed May 15, 1946 12 Sheets-Sheet 4 INVENTOR.- JOHN MF/P/[DMAN TTORNEYS June 3, 1952 H, FRlEDMAN 2,599,053

COLD HEADER Filed May 15, 1946 12 Sheets-Sheet 5 INVENTOR.

JOHN H. FRIEDMAN BY r/M A TTORNE Y6 J1me 1952 J. H. FRIEDMAN 2,599,053

com HEADER Filed May 15, 1946 12 Sheets-Sheet e mmvron. Jam/H Ffi/EDMANTTORNE VS June 3, 1952 J1 H. FRIEDMAN COLD HEADER led May 15, 1946 12Sheets-Sheet 7 INVENTOR. Joy/v H FR/ED'VA/V fl BY M! M TTOfPNEYS J 1952J; H FRIEDMAN 5 3 cam HEADER Filed May 15, 1946 12 Sheets-Sfie'et aDWELLS w k Q INVENTOR.

JOHN h. FRIEDMAN TORNEYS June 1952 J. H. FRiEDMAN 2,599,053

cow HEADER Filed y 1946' 12 Sheets-Sheet 9 INVENTOR. JOHN H FRIEDMANTOENEYS J1me 1952 J. H. FRIEDMAN 2,599,053

COLD HEADER Filed May 15, 1946 12 Sheets-Sheet 10 IN VEN TOR. J OHIV H.FRIEDMAN fliyr/w A TTO NE Y5 June 3, 1952 J. H. FRIEDMAN cow HEADERFiled y 15, 1945 12 SheetsP-Sheat 11 INVENT JOHN RIED N J 3, 1952 J. H.FRIEDMAN 2,599,053

com HEADER Filed May 15, 1946 12 Sheets-Sheet 12 mmvrox. JOHN H.FEIEDMA/V BY fw TOENE Y5 Patented June 3, 1952 COLD HEADER J ohn'H.Friedman, Tiffin, Ohio, assignor to The National Machinery Company,v'Iiifin, Ohio, a

corporation of- Ohio Application May 15, 1946, Serial No. 669,940

, 4 Claims.

'This' invention relates to metal working machines; more'specifically toforging or heading machines sometimes referred to in the art asdoubleblow headers. r

Generally speaking, a double blow header of the type to which thisinvention relates includes a die block through which stock is fed byintermittently driven feed rollers, timed shearing mechanism whereby ablank is sheared off, transfer mechanism whereby the blank is positionedin front of a forming die, and a header slide carrying forming toolswhereby the blank is given two heading blows before the next shearingcycle takes place. The header slide is reciprocated in the usual mannerand usually includes two heading tools mounted on a shifting mechanismwhich alternately presents the tools to the blank. In a double blowheader, the arrangement is such that the header slide makes two strokesto one stroke of the shear and transfer mechanism thereby providing theso-called double blow arrangement.

In the machines of this type which have been used before my invention,it was customary to provide in the die block a shearing die whichreceived the rod or wire stock and which was traversed by the shearingmechanism to shear off the blank. A forming die was also provided infront of which the blank was positioned and in which it received thedouble blow forming operations. Prior art shearing mechanisms have beendesigned so that the movable portion of the shear which shears the blankcontainsa solid shearing portion having a blank receiving notch, usuallysemi-cylindrical, and a mechanically operated finger to retain the blankin the shear notch after'the shearing portion has done its work.

---After the blank was sheared on and positioned in front of the die,the first heading operation initially caused the blank to be forced intothe die with which the solid portion of the shear must be rapidlyretracted to permit the heading tool to continue on its heading stroke.

Such arrangements in the prior art have been proven in practice to offerseveral serious disadvantages. In the firstv place, the .use of an openbodied shear has resulted in the formation of irregularly shaped shearedblanks. It is an object of my invention to provide relatively regularand uniformly formed sheared blanks by the use of a so-called solidshear in which the stock is fed into a completely enclosed aperture inthe shear. Although a solid shear of this type has been known in'theart, for reasons which will appear as this specification proceeds,priorworkers in this field have been unable to adapt the use of a solidshear to a simple double blow header such as that to which thisinvention relates. 7 I v 7 Another disadvantage of the open shear andfinger arrangement found in the prior art stems from the fact thattiming of the motion at the instant the first tool strikes the shearblank and starts to force it into the die, must bevery accurate and mustbe maintained accurately, otherwise either one of two undesirable thingswill occur. Either the shear and transfer mechanism will open andretract before the tool catches the blank in the die, or the shear mightdwell in-front of the die just long enough for the tool to strike anddamage the solid portion thereof. It is an object of this invention toprovide a shear and transfer mechanism in which the solid portion of theshear-is at a dwell or rest period during the first blow so that thereis little danger of damage thereto, and likewise it is an object toprovide a transfer mechanism on the shear which is suchthat slighterrors in its motion or position will not result in damage to themechanism.

According to well-known principlesof machine design, in machines whichperform metal forging operations such as those carried out here therigidity of the various parts of the machine is a highly importantfactor both in accuracy of the product and in the life of the machine.Of course, rigidity can be obtained by either of two methods, namely,that of increasing the weight and size of the parts to withstand a givenbending moment thereon, or to dispose the parts relatively closetogether, thereby decreasing the loads and bending moments, therebybringing the size of the machine to a minimum. Those skilled in this arthave not been'unaware of these problems and have made every attempt todispose the dies as close together as possible,'thereby reducing theloads on the machine and permitting better all around machine design.

According to the principles outlined above,.the die which receives thestock and the forming die have been placed as close together as possibleconsistent with the provision of proper clearance between the shear andtransfer mechanism and the header slide and tools, during the headingblows. This has meant, however, that the shearin the need for veryaccurate driving cams or,

other mechanism' and rapid acceleration and 1 gets 2 deceleration of theshearing mechanism, all of i which contribute to the wear of themachine. It

is an object of this invention to reduce wear and impact on the shearingmechanism by cutting the shear travel to half that found on similarmachines currently being manufactured. Briefly, this is accomplished byproviding an intermediate transfer station between the die whichreceives-the stock and the forming -die. With this arrangement the shearneed only move the blank to the transfer station, a distance halfl thatformerly covered.

Likewise, a transfer finger arrangement is provided on the shear" whichtransfers the blank from the transfer 1 station to the forming die,:theznet :resultbeing that the shear motion is halved.

As mentioned above, in the .prior (art the. sheared blank tended to benon-uniform and erratic in size. This is true, although to areduc'eddegree, when a solid shear is provided. Accordj iQglgX, it.is-aiurthenphiect of thisinventionto pres n uniform y siz d bl nks tothe-forming d e th s. ssnltrbeineohtained by tak n advana taeerof the,transfen'd and p min a -pr liminary sizing operation on the blankwhileiit isin thatdie.

ihese-and othe ob ects of my nventio w e-Q esapparente o those s lled nthe art as.

thezfcllowins.de ai ed flescn piion of a pre erre mbo imen proc eds; Y

. :Inrthedrawings:

' E a lusa pla vi w-o my ouble-header part ki m ill. i h m i ld a i s mng to-illusra aley Ra he a h n f aqh. Q hese figures. mchides w s. hefirs b. sim la t fils- 5 biit wit Y n e med ate, o tion oi-t t mo q ziliigzj9 shqws help it ns q i rar simsi the first'blow starts and. asthejhla'nk jis first hqws. he comp ion. oi h fir iiblowr Fig. '1;1 showsthe parts a position in beii' ie h fiist nq econd new with th a smehaeie rr ra fiae; i

I Fig-"-l2 showsthe :seco d l fit iii'e i sp s out-*and-feedrandfocourse; the cycleis comi' i i i th u h-my. ma.

Fiat 3." wa heeadin 99. e nnineto. retract after second :blow'. the pa1't s dwelling; preparator 9 i swki knock-out arm s-cl Y ay be k mv .esic

P per ime, m tte s ch; am ma 4 pleted by reference back to Fig. 7 whichshows the final part being knocked out.

Fig. 14 shows a modified transfer finger actuating mechanism.

Referring now to Fig. l, the machine is housed and supported in a frameshown generally at U. In accordance with conventional practice in thesemachinesthe crank-shaft it is provided with a crank which reciprocatesthe I connecting rod 2 pivotally connected in any conventional manner at3 to the header slide in order to reciprocate ,the heading slide H. Theheader slide may be mounted in accordance with usual practice inways=;or..guides which permit its reciprocation. A fr ovabl'eitoolsupporting arm member A is positioned-at the forward portion of theheader slide.f;or carrying .tools T2 and T: which perform the headingoperations. A hammer tool T1 is mounted-solidly on the face of theheader slide. The crank shaft I maybe driven by a fly wheel andziilleyar aneemen pit-sha ivi-hggpinionA v speed. 7 Theiack-phait .5 cawhich. meshes wit se ond mi e ar- "t drive the neitudina ha t .0.-

.order that: the-.- shearin mechanism and ranst m sm may be :on rated,cam M- ear-limam-rename reierrentte con e t ntheretqrzzn setond'p i -ofmt nants Mand -.5 re alsm h wn, F

drive the knockout mec an sm. Tw knack.

out-cams: 1 and warerd ivn byatheacrosszshafit; Hi; the kna k-.0. carms13ml appear to b r advanta e in -.0t er views and will be re e re ytoreg i iadjustinezscrew supportl'3 ;-may;be monntedwnthe frame anditcarries: adjustable-stock screws 52.0; for j the.:;kncck-;01Lt

t the feedir iler thing $1 118 m kt e s i ss beare A portion of thesecond knock-out arm K2 epa ia ly .ss ntbe ;K. es-.at..

eefi he; necka utramns;

tee-,1 shii inem chan sm i s y hfi. I-

.Qemia ar aeiath ca eise n an :aperture. omthe; headert 'slid'e l-li end.of shaftil cma'yg can portionl'l which mm -by 'the shift 'arm e.- That.portions'of the :shift armfii3 wh-ich recei ves the squared; portion 22is apertureci: portion -iz- 'asat l ffl; f vided-withacamengagmgdinal'shait f0;

son inragprefemzedv embodiment, ya.v oplzzsuppprting. ami .Armaymounted- ;on;a shafftazils which-extends.through and the roller and cam25 are clearly seen in v Fig. 3. A spring 25a or other means may beprovided to force the shift arm-against its driving cam, and stops z'lmay be provided for the arm. -The details of the tool shifting mechanismform no part of this invention and reference is made to Patent No.1,932,396 issued to W. L. Clouse on [October '21, 1933, for another typeof tool shifting mechanism which may be employed without departing fromthe spirit of this invention. i

So that the headersiide H may reciprocate and permit the tool shiftingmechanism to operate, a pair of fixed cheek members 26 areprovidedtorestrain the shifting arm 23 from axial.

motion while permitting'it to have reciprocating motion. As best seen inFig. 1, cheek members 26 may be integral with or attached to the frame,andlmember 22' merely slides through the arm 23 as the header slidereciprocates. Shaft 2| may be axially restrained in the header slide byany convenient arrangement of collars or other restraining means.

The principal details of the shearingmechanism are best seen .in Fig.'4. 'Wh'at is needed is'means' to movethe shear a proper distancerelative to the dies at the proper time, and means to move the transfermechanism clear of the forming die at the proper time. B carries threedies: Die D1 which receives the The die block stock is behind the shearand is shown in dotted lines- The intermediate or transfer die D2 is rshown behind the solid shearing portion of the shear .and it, too, is indotted lines. The third or forming die D3 is shown with the transferoperates against roller 3211, the relative axial position of the camsand rollers being clearly illustrated in Fig, 2.

Continuing the description of Fig. 4, at the upper end of the shearbody30 may be seen the shearing block 34 which'may be integral with theshear body or solidly attached thereto.

The -..action of this block willbe explained presently.

Plvoted to the shear body is the transfer finger supporting arm 35,pivot 36 being provided for the purpose. A finger spacing extension 31is formed on block 35 in order to mount the transfer .fingers F, thesefingers being retained by a bolt 39 .and spring 40 in the preferredembodiment. Attached by any convenient means 4| to the arm 35-is aspring-42 which, in turn, may

be fixed to the shear body 30. Spring 42 pulls:

the finger supporting arm 35 against a positioning pin' 43 which pin maycarry a roller 44 at its lower end. Roller 44 engages the transferfinger-actuating cam H in order" that the trans-. ferfinger may belifted clear of the forming die 1 at the-"proper time. A bracket 46 maybe in-' tegralwith or fixedto the frame U, this bracket. having a pinguiding portion 41 and a-feed stop arm 48, the action of which will bedescribed. in detail later in this description. The parts shown here,particularly the bracket 46, are

simplified for purposes of. explanation. In actual practice, and inaccordance with accepted tool machine design practice, pin 43 wouldreceive additional support adjacent cam II.

for clarity.

Fig. 5 is a section through the dies which shows the method of mountinga punch pin P in the shearblock. Die D1, which receives the stock, andwhere it is sheared, the transfer die D2 and the forming die D3 arepartially shownin-Fig. 5. Part of the shear body 30 is shown insectional: form and the shearing block-34 also appears sectioned,revealing the bore 49 which receives the stock when the'shear block ispositioned in 'It is this block which shears front'of die D1. off'ablank (not shown) and presents it to die D2 when the shear is movedtothe position shown in Fig. 5. These operation will bereferred to againin connection'with the tracing through or a cycle. The punch pin P fitsbore 43 and may be restrained therein by a pin and slot arrangement 5|and 52, these being merely one of many forms which could be employed for-this purpose. The spring50 serves to retractthe pin to its position.

Fig. 6 is an enlarged partial view of the transfer finger arrangeme'ntshowing howthe transfer fingers F are carried on their supporting arm35. The spacing block 31'which may be integral.

with arm 35 is engaged by the fingers, and both the block and thefingers are apertured to receive a bolt 39 which carries a nut. SpringMIcauses both fingers to be resiliently urged against block 31. Thefingers are formed with notched parts 53 so designed that a circle ofthe diameter X may beinscribed therein, and the notches 53 and the block3l are so proportioned thatthe circle X is somewhat less than thediameter of the stock or blank to be engaged by the fingers. so thata'positive gripping action will be obtained.

A relieved or beveled end portion 54 is provided on each finger so that,as will be described presently, if necessary the finger could snapover)" a piece of stock or blank when moved down-"f wardly against thesame. The fingers are beveled" as at 53a to facilitate entry of theheading tool between the fingers.

Having completed the detailed description of the various parts of myimproved double blow header, I shall now proceed to explain a series ofdiagrams which present in chronological order certain forming operationswhich take place during the machine cycle; As mentioned before;

no attempt has been made to confuse the drawings by including machinedesign details which are well known to every mechanic, the basic'ele;:-'

ments are all shown in as simple a manner as possible, withoutsacrificing a clear disclosure of the manner in which my machine can beconstructed.

step in a series of drawings, each drawing in- ."cluding two parts. Atthe "left of each .fig-ure is However, 1 such obvious and conventionalparts are omitted};

J91 ing tool T3 is swinging into position for the second blow, Tool Tamay contain-a head forming recess 61, the shape of which is dictated bythe articletobe formed.

- In Fig. 12 the completion of the second-blow is illustrated. As seento the 1eft,'the shear has almost'reached its left position. "In;theview at the right-it can be seen how the heading tool T3 has headed overthe blank forming, in this case, the final blank intheshape of a rivetO4.

- In Fig. 13 the header slide is retracting and the shear is againpositioned at its extreme left position with the transfer fingerspositioned in frontof the transfer die and the shear block in front ofthe shear die ready for the feed and knock-out operation. 1

- Fig. 7 completes the cycle, the rivet 04 being knocked-out, knock-outarm K2 acting through plunger 56 and knock-out pin P3. The ope'ra tionstaking place simultaneously at the shear die and transfer die have beenexplained previously;

14 illustrates a modified mechanism for positioning the transfer fingerscarried by the shear. In place of the pin 43 shown in Fig. 4, a linkmechanism is provided in the modified form, this mechanism having someadvantages such' as those of rigidity and ruggedness. Bell crank'member10 has a roller H which engages the cam II. The bell crank is pivoted onthe fixed pivot as at 12 and is linked toa vertically extendingconnecting link '13. The roller H is kept against the cam by the springrod 14 pivoted to the bell crank at I5 and surrounded by compressionspring 16 mounted in any convenient manner. The upper end of the link 13is pivoted at 1T to a finger actuating lever 18, this lever, in turn,being pivoted 'to'the shear mechanism at 19' and terminating in anenlarged cam end 80. The finger carrying block 82 is recessed as at 81to receive the end 80 of the finger actuating mechanism. This mechanismserves the same function as that previously described and the cam I l isdesigned to have a contour which works with the modified fingermechanism to move the fingers in the position in front of the dies andto raise them clear of the-dies at the proper time in the cycle asdescribed in connection with the description of the other modification.

, Having completed the detailed description of the basic machineelements required to provide my improved double blow header and havingtraced through a complete cycle-of operation, it can be seen how I haveprovided a novel machine and have carried out the various objectsreferred to at the beginning of this description.

Those skilled in this art will readily appreciate the advantages of thesolid die in the provisions of a'si'zed and uniform sheared blank. Mytransfer die D2 is relatively lightly loaded and can be placed inbetween the conventional shear die D1 and the forming die D3, therebyhalving the motion of the shear. This reduces wear and impact on theshearing mechanism and permits the formation of more accurate actuatingcams in that there is less difference between their high and. low parts.

Likewise, those skilled in the art will appreciate that due to thebeveled and resilient mounting construction of my transfer fingersslight misalignment will not cause damage whereas in the conventionalarrangement of this sort a part of the shearing mechanism might becomeinadvertently positioned in front of the forming tool. Furthermore,those skilled in the art will appreciate that my first forming tool canvbe: made of'a relatively heavy construction becauseinmy design therelatively light beveled fingers :oan'b'e quickly snapped clear afterthe blank is caught inthe forming die. I

f It will be understood that the rivets which I have shown manufacturedin my machine have only been illustrated in order that a cleardisclosure. of how the machine operates may .be presented; Of course,the exact nature of the blank formed-is a function of the shape of thedies, heading tools and knock-out pins. It would also be possible toextend the principles illustrated in this machine. and provide a machinewith more than one forming die by merely adding additional pairsof'fingers to the finger supporting arm together with'the proper headertools. The various mechanisms and machine elements which have beenillustrated in order to build up an operative machine in thisspecification may be. mOdi-r fied and their equivalents 'may besubstituted without departing from the spirit of my invention. These andnumerous other modifications will suggest themselves to mechanicsskilled in the art to which this invention relates and it is to beunderstood that such modifications should not remove the device thusprovided from the spiritof my invention as defined in the appendedclaims. Having thus described the present invention so that othersskilled in the art may be able to understand and practice the same, Istate. that what I desire tosecure byLetters Patent is .defined in whatis claimed.

I claim: 2 I 1. In a metal working machine a frame, a die block mountedin said frame having a stock feeding aperture, an intermediatedie and aforming die, a header slide carrying a heading tool-reciprocably mountedin said frame, driving means in said frame to reciprocate said headerslide,.a shearing mechanism mounted for reciprocation across said dieblock, means to drive said shearing mechanism in timed relation to saidheader slide'drive, said shearing mechanism including a shearing recesswhich is closed-'over'more than 180 of are, said block being driven toshear off a blank at said stock feeding aperture and to pre-' sent saidblank to said intermediate die, means carried bysaid header slide forforcing a sheared blank from said shear block into said intermediate dieon a first-forward stroke, said shear ing mechanism driv means beingtimed to'hold said shearblock stationary in front of said intermediatedie during completion of saidfirst' forwardstroke and toretract theshear block toward said stock aperture during the following forwardstroke, transfer mechanism moved by said'shear mechanism; fortransferring a blank from the intermediate die to said forming die,means-to move said transfer mechanism clear of said form-v ing die whilesaid shear block is'held stationaryat said intermediate die, andshiftable coning and heading tool means carried by said header slide andarranged to provide forming successive coning and heading operations onthe same blank at said forming die with said transfer mechanism clear ofsaid die.

2. In a metal working machine, a frame, a die block mounted in saidframehaving a stock feeding aperture, an intermediate die and a formin die, aheader slide carrying a heading tool reciprooably mounted in said frame,driving means in said frame to reciprocate said header slide, a shearingmechanism mounted for reciprocationmss'seimdieabibck;meaiistoziiriveisaidiisiieewmg" tiniecisreiatiom toeslide dime;-.saidesliealringzmechanismzinehxding arsniid.

'sliarfbloclthavingcaxbinlmrecefiingaandzslzieiming recess which isclosed overfnm'esthmdiilfl? bfiia'xic';sazibbl'ocirbeingxdrivemtmsheareem atJaI'ankaitissictis'tbckieedmgiaperturezam :to presentesasidhlinkzteifsaidiintermediate die-;;meafis carziediby safitl ieader"skates" for: foreingaas blank said fshearsbloekimtm Sam 2mtermediazheidie unis. fflfrstlt-forweird stroke andzthereafiten: sizinsaid) sheared sait: shearing: mechanism di iizemeans'ibeihgfbimedetaholdsaidzf'skieanshlockstationary inifionttoi saridzintetmediatezdie:time of: saicilfizst i simke aandr retraekithe: shear? hIeek;..'towaret;saiiI: smackv aperture: during: the fOHQWiIJ-gi iarwai'dr stmke,

txzansfir mechanism mvembys saidisheanme hav fen: tmnsferring blank:from; thei inter-- mediate: diato die,:means;tu mmee saidit'ziar'nsfemmechanismmlearrofi saidiformingidie whil'e'isaidshearzfbloekiisrhellstaitimarysamsaid intsmdiatezdie;.saidzheazdensliiiezearzying shiftsaidifor'ming: diezwitlis said transfier r mechanism eleafiot saididiei. these: successive: opera .beingivpertormedi. during: first strokeamtfitiemtfiefiduringesaidsibllawing: stmken31mraimetaskzwarkingamaclfine;La; frame,-.asdie black: mountedzimsazictframes-having suhstam tier} alignmentzmsmck 'ieed-ing-:aperture;; an;inter? mediate die and a formingdieyafheader slide carrying a headingtool reciprocably: mounted said; frame," driving memesv said; frame toreeinracate saidzheadervsi d s-a sheerine meem anismmeuniediorxeeinmeationiacmsszsaidrdiesi meansstmdriwsaidshearingzmechanism in timed relationste;saimheadewslide drive;said-shearing meehanismrincludingw solidsshear block having a:blank-receiving and; shearing; recess which. is, closed; over more than180 01: are, saidblock beingmriven; to; sheen 011- ablanki .atsaid.stock.

mechanism: for 1 tnansier ing a, frQm: the.

intermediate diem said-fqrming-die, saidufiizansiei;

mechanismbeingmovabie.across theline Qfsaid diesamea'ns toiifi-saidmransien mechanism! clear. qf saii-formingv die whilesaidhshear blnckiis .held. stationary zit-said h tennediate die, .saidheader slide. canryingishiftabletooim means fin; petffirmv ingtwodifferent vsuccessivefiarming operations .on.

thgsame. lilankv at said; forming die with. said' Numbersaid'aflr'st-siiitoke andrthe:othendnninseaidfillaw ing stroke. V

4;; In: 8 3161 3 1; work-mefmaemne: a: a cue bimk-mmmted? saidfiremellia ingza siaq i" feeding'axnertur mw' intermfidiate' ieiaindi esteem:ns? a2" he n slider Query a; headings m1 meinme'ebly- ;liwimied1:seidframe-2."; means vasiiei. fla e: te reeipm ate: sa d; zeaeler slidzashearingsme ha ism meu t q f smcinm- CQJE QIhWIQSSFSQI-Kldiebioeiameens to ime. shearinggameehalnism in; timed; relafifln,tmsgigi eden'slide-drives cempx s s az Qem,-s.1aaii miai ableinisaidiframefandrcamimeans om azid shaf engaging said shearingmechemsmrsfii ishefifln& meehanism-including; a solid 5 188 1; blQe fi"ha in a..-b1ank receiving; and shearing-i 2808.58,..W-hi6lL-i5 clqseci.aver n'ie'a'e;iii-1am; 18,9? 0f 3:176, 'sa di hlQQ fi being xrivenwshear; ib ashlanlg alt said-steels feedings aperture and .to, resentsaid; lenkste said intermediate die. means carried by z-sgiei header==slides fen iqreing, a sheared: biankimmsaidssheenblockiintofisaidqintermedi ewdieeqma ioifwerd: stmke; said.hearmg' mechanism (3:12 m eansbeine: imed tar holdisaidshean block tionary mifrqmvofi saidqintermediate die-m ning completion; of sax-id forwerdstroke; transfer; mechanism mounted; on saint shear -mechaznism for.i:rzir sferring a blank frame-the intermediateqietu-saidqformine,die.,,means toma ze fen meehanism across "the,lineaqi mQtiQni-tnermf. fromsdieto. die tql clear said v fuming:drieiwhiie said; sliealr blockiis vheldetationaryf at said v intezze meat iasa dn lasts named eomnnisine additignel camemeans (in, saidcame-sheik and calm fqllower: means maunted, omsaidirammad iaeentsaiidishearing hamsmkand tooiimeans carriedby saitIlieadr. slidefiam.arranged tw 1 form a fbrmine; 'operatiau at; said, fo m with;saidltransfer meehanismwlean of. said'idie.

' REFERENCES "QIIED"

